I have two thoughts.
First thought -I am opposed to government entities competing against private businesses.
Second thought - its public property, why shouldn't the public be able to use it as long as it does not interfere with its primary function and a funding means can be arranged that covers any extra costs that might be incurred.
I am sure there are all kinds of logistical and liability issues that would need to be resolved before something like this could be arranged.
I was told that at one time the police ranges around here were open to the public, but when they built the new public safety building they decided not to allow the public to use the nice new range with all the bells and whistles. Supposedly the official reason was they did not want civilians to know how the local cops were training.